iDOO Bluetooth Overear Headphones Wired Wireless Stereo Headphones with Microphone Black (aptX Advanced Bluetooth CSR version 4.0) Advanced Bluetooth 4.0 technology with NFC and support for aptX and AAC audio codecs for HD-quality audio Up to 22Hours of Music playing &taking time,standby time more than 250 hours. Special speaker transmits high fidelity & powerful bass and detailed wireless sound to your ears. Built in microphone for headset functionality with controls for media and phone calls. Ultra-soft ear pads and adjustable headband for extended wearing comfort